Illustration from a 16th-century treatise on comets and meteors, created anonymously in Flanders (now northern France). Commonly known as The Comet Book (or Kometenbuch in German), its full title translates as “Comets and their General and Particular Meanings, According to Ptolomeé, Albumasar, Haly, Aliquind and other Astrologers”. (Universitätsbibliothek Kassel, CC-BY SA 4.0)